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In page The Letter (1929 film):

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Due to it being long out of circulation, the film was believed to be lost.[citation needed] However on April 3, 2011, a workprint of the film was found and given to the Library of Congress and The Film Foundation, who restored the film in June 2011.[1] The film was then released on home video by Warner Bros. Pictures as part of its Warner Archive Collection as a made-on-demand DVD.[2][3] It is the only surviving sound film starring Jeanne Eagels.[3]